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• ffmpeg error or success

  3 juillet 2018, par user1867151

  I have a file sample.aif on which I want to apply the below filters :

  1. Trim sample to a maximum duration of 2 seconds

  2. Compression applied with settings : threshold 0.1,ratio=2,attack=5

  3. 20 milliseconds fade out at end .

  I am running the below ffmpeg command : ffmpeg -i kick.aif -af atrim=0:120 -af acompressor=threshold=0.1:ratio=2:attack=5 -af afade=d=0.02 kick.ogg 2>error.out

  When I check the return code I see it is 0 however my error. Out file has the below output :

  cat error.out
  
  ffmpeg version 2.8.14-0ubuntu0.16.04.1 Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 5.4.0 (Ubuntu 5.4.0-6ubuntu1~16.04.9) 20160609
  
    configuration: --prefix=/usr --extra-version=0ubuntu0.16.04.1 --build-suffix=-ffmpeg --toolchain=hardened --libdir=/usr/lib/x86_64-linux-gnu --incdir=/usr/include/x86_64-linux-gnu --cc=cc --cxx=g++ --enable-gpl --enable-shared --disable-stripping --disable-decoder=libopenjpeg --disable-decoder=libschroedinger --enable-avresample --enable-avisynth --enable-gnutls --enable-ladspa --enable-libass --enable-libbluray --enable-libbs2b --enable-libcaca --enable-libcdio --enable-libflite --enable-libfontconfig --enable-libfreetype --enable-libfribidi --enable-libgme --enable-libgsm --enable-libmodplug --enable-libmp3lame --enable-libopenjpeg --enable-libopus --enable-libpulse --enable-librtmp --enable-libschroedinger --enable-libshine --enable-libsnappy --enable-libsoxr --enable-libspeex --enable-libssh --enable-libtheora --enable-libtwolame --enable-libvorbis --enable-libvpx --enable-libwavpack --enable-libwebp --enable-libx265 --enable-libxvid --enable-libzvbi --enable-openal --enable-opengl --enable-x11grab --enable-libdc1394 --enable-libiec61883 --enable-libzmq --enable-frei0r --enable-libx264 --enable-libopencv
  
    libavutil      54. 31.100 / 54. 31.100
  
    libavcodec     56. 60.100 / 56. 60.100
  
    libavformat    56. 40.101 / 56. 40.101
  
    libavdevice    56.  4.100 / 56.  4.100
  
    libavfilter     5. 40.101 /  5. 40.101
  
    libavresample   2.  1.  0 /  2.  1.  0
  
    libswscale      3.  1.101 /  3.  1.101
  
    libswresample   1.  2.101 /  1.  2.101
  
    libpostproc    53.  3.100 / 53.  3.100
  
  Guessed Channel Layout for  Input Stream #0.0 : stereo
  
  Input #0, aiff, from 'kick.aif':
  
    Duration: 00:00:01.54, start: 0.000000, bitrate: 3072 kb/s
  
      Stream #0:0: Audio: pcm_f32be (fl32 / 0x32336C66), 48000 Hz, 2 channels, flt, 3072 kb/s
  
  Output #0, ogg, to 'kick.ogg':
  
    Metadata:
  
      encoder         : Lavf56.40.101
  
      Stream #0:0: Audio: vorbis (libvorbis), 48000 Hz, stereo, fltp
  
      Metadata:
  
        encoder         : Lavc56.60.100 libvorbis
  
  Stream mapping:
  
    Stream #0:0 -> #0:0 (pcm_f32be (native) -> vorbis (libvorbis))
  
  Press [q] to stop, [?] for help
  
  size=       6kB time=00:00:01.52 bitrate=  33.9kbits/s
  
  video:0kB audio:2kB subtitle:0kB other streams:0kB global headers:4kB muxing overhead: 175.053040%

  I am absolutely new to ffmpeg. Can someone tell me where I am going wrong ?

  Many thanks in advance.

• ffmpeg command gives error when used in python

  3 juillet 2018, par Yaser Sakkaf

  When I run this command from the shell it works perfectly.

  ffmpeg -nostdin -i /data/binil/v2t_final/output/cnbctv18/2018_07_02_14_38_30/tmp/merged.avi -ss 00:00:00 -vcodec h264 -vf fps=25 -to 00:6:43 /data/binil/v2t_final/output/cnbctv18/2018_07_02_14_38_30/1/1.avi

  But the same thing when I do in python it gives error :

  import sys
  
  import os
  
  
  
  INPUT_DIR = sys.argv[1]
  
  INPUT_VIDEO = sys.argv[2]
  
  OUTPUT_PATH = sys.argv[3]
  
  SOURCE = sys.argv[4]
  
  DATE = sys.argv[5]
  
  
  
  INPUT = INPUT_DIR+"sorted_result.txt"
  
  COUNT=1
  
  initial="00:00:00"
  
  
  
  with open(INPUT,"r") as f:
  
    for line in f.readlines():
  
      OUT_DIR = OUTPUT_PATH+str(COUNT)
  
      directory = os.path.abspath(OUT_DIR)
  
      print('OUT DIR',OUT_DIR)
  
      print('directory',directory)
  
      try:
  
        os.mkdir(directory)
  
      except:
  
        pass
  
      cmd_1 = "ffmpeg -nostdin -i "+INPUT_VIDEO+" -ss " +initial+ " -vcodec h264 -vf fps=25 -to " +line+ " " +OUT_DIR+"/"+str(COUNT)+".avi"
  
  os.system(cmd_1)
  
      COUNT += 1
  
      initial=line

  I cant understand the problem :

  The error is as follows :

  ffmpeg version 4.0-static https://johnvansickle.com/ffmpeg/  Copyright (c) 2000-2018 the FFmpeg developers
  
    built with gcc 6.3.0 (Debian 6.3.0-18+deb9u1) 20170516
  
    configuration: --enable-gpl --enable-version3 --enable-static --disable-debug --disable-ffplay --disable-indev=sndio --disable-outdev=sndio --cc=gcc-6 --enable-libxml2 --enable-fontconfig --enable-frei0r --enable-gnutls --enable-gray --enable-libaom --enable-libfribidi --enable-libass --enable-libfreetype --enable-libmp3lame --enable-libopencore-amrnb --enable-libopencore-amrwb --enable-libopenjpeg --enable-librubberband --enable-libsoxr --enable-libspeex --enable-libvorbis --enable-libopus --enable-libtheora --enable-libvidstab --enable-libvo-amrwbenc --enable-libvpx --enable-libwebp --enable-libx264 --enable-libx265 --enable-libxml2 --enable-libxvid --enable-libzimg
  
    libavutil      56. 14.100 / 56. 14.100
  
    libavcodec     58. 18.100 / 58. 18.100
  
    libavformat    58. 12.100 / 58. 12.100
  
    libavdevice    58.  3.100 / 58.  3.100
  
    libavfilter     7. 16.100 /  7. 16.100
  
    libswscale      5.  1.100 /  5.  1.100
  
    libswresample   3.  1.100 /  3.  1.100
  
    libpostproc    55.  1.100 / 55.  1.100
  
  Trailing options were found on the commandline.
  
  Input #0, avi, from '/data/binil/v2t_final/output/cnbctv18/2018_07_02_14_38_30/tmp/merged.avi':
  
    Metadata:
  
      encoder         : Lavf58.12.100
  
    Duration: 01:00:50.23, start: 0.000000, bitrate: 1334 kb/s
  
      Stream #0:0: Video: h264 (High) (H264 / 0x34363248), yuv420p(progressive), 512x288 [SAR 1:1 DAR 16:9], 1001 kb/s, 25 fps, 25 tbr, 25 tbn, 50 tbc
  
      Stream #0:1: Audio: mp3 (U[0][0][0] / 0x0055), 48000 Hz, stereo, fltp, 639 kb/s
  
  At least one output file must be specified
  
  sh: line 1: /data/binil/v2t_final/output/cnbctv18/2018_07_02_14_38_30/1/1.avi: Permission denied

  Please help.
  This is some dummy text I am writing because it looks like stack overflow does not accept less description and more code. Please don’t mind these sentences. I cant believe that I am still writing this and it is still requesting me to add some more description. I am still doing it. Don’t know till what extent do I have to write. I hope this much is enough.

• FFMpeg video stopmotion

  22 juillet 2020, par Praveen Tamil

  I would like to create stop motion video from original video.
The logic is take frame at specified interval. 
And play the video with specified playback rate.

  



  For example,
  
The original video duration is 114.048 seconds.
  
The output video playback rate 5 times faster than source video.
  
Take each frame at the interval of 1 seconds. so the final video duration should be (22.81 = 114.048/1*0.2) seconds

  



  Below is the screenshot of demo

  



  For this I need ffmpeg code

  



  ffmpeg -r 1 -i D:\21-03-2018\15305154945b39d026a18da.mp4 D:\21-03-2018\output.mp4